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POWER UNIT
5.7.3 Motor temperature detection
The COMBIVERT P6 has a switchable KTY84 / PTC / Pt1000 evaluation. The input has
„basic insulation" to the supply and to the „safely insulated voltage" (control board volt-
age)! The desired function is set with dr33 and works according to the following table:
dr33
function of T1, T2
KTY84
0
(standard)
PTC
1
(in accordance with
EN
60947-8)
Pt1000
(from Drive Unit Firmware
4
2.7.0.11 and Power Unit
Firmware 2.4.0.13)
Table 11:
Motor temperature monitoring with PTC, KTY or Pt1000
NOTICE
NOTICE
Figure 29:
52
Resistance
< 330 Ω
359 Ω
1 kΩ
1.722 kΩ
> 1800 Ω
< 750 Ω
0.75...1.65 kΩ (reset resistance)
1.65...4 kΩ (tripping resistance)
> 4 kΩ
< 330 Ω
843 Ω
1000 Ω
1385 Ω
1759 Ω
> 1800 Ω
faults and malfunctions !
► KTY, PTC or Pt1000 cable inside the motor cable only permissible
with double shielding !
► Do not lay KTY, PTC or Pt1000 cable of the motor (even shielded)
together with control cable !
No protection of the motor winding in case of wrong connection !
► Operate KTY sensors in the forward direction. Non-observance
leads to incorrect measurement in the upper temperature range.
+
M
KTY84
Connection of a KTY sensor
Display ru28
Short circuit
-40°C
100°C
200°C
Open circuit
PTC closed
undefined
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PTC open
Short circuit
-40°C
0°C
100°C
200°C
Open circuit
T1
T2
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